Help With ID'ing Grass or Weeds

I finally have the time to maintain a schedule for my yard. Moved in recently and the previous owners definitely didn't take care of the yard so I suspect the backyard is mainly weeds with possibly some hope for the front and side yards. Just seems like different grass everywhere. Hoping y'all can help me ID what I have so then I can find the right schedule for it.

I realized how bad most of the pictures I took were when I went to post them here, so just let me know if they are worthless and what type of pictures I should take that would actually be helpful.

Here's a link to the gallery because the images seem very pixelated in the preview LINK

Side yard:
[/url][/img]

Backyard:
[/url][/img]

Weed:
[/url][/img]

Front yard:
[/url][/img]
[/url][/img]